Get clean, controlled holes across thin metals and plastics with this Makita HSS step drill. The straight-flute, high-speed steel construction and stepped cutting profile let you expand a single pilot hole to any size between 4 mm and 32 mm in 2 mm increments 4 / 6 / 8 / 10 / 12 / 14 / 16 / 18 / 20 / 22 / 24 / 26 / 28 / 30 / 32 so you carry fewer bits and work faster. The straight (three-flat) 10 mm shank gives a firmer grip in chucks than a smooth cylindrical shank, reducing slippage and vibration for smoother cutting and longer tool life. At an overall length of 102 mm the bit balances reach with control, and the recommended operating range (400680 RPM) keeps cutting efficient while minimising heat. Designed for tradespeople who want repeatable, burr-reduced holes, this step drill delivers faster drilling, less vibration, and a noticeably longer lifetime compared with ordinary bits. Tidy, versatile and robust perfect for electrical, plumbing and fabrication tasks where speed and finish matter.